NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 337
ONVOY, LLC - LA 17
NEW CINGULAR WIRELESS PCS, LLC - GA 2
CSC WIRELESS, LLC 2
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-01-20 337-279-3XXX 3000–3999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2021-01-20 337-279-4XXX 4000–4999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2021-01-15 337-666-6XXX 6000–6999Assigned FRACTEL, LLC 965H REEVES LA
2021-01-11 337-333-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F RAYNE LA
2021-01-11 337-372-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F MERRYVILLE LA
2021-01-08 337-275-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F JENNINGS LA
2021-01-06 337-486-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STMARTINVL LA
2021-01-06 337-935-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DUSON LA
2020-12-23 337-333-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F RAYNE LA
2020-12-11 337-549-9XXX 9000–9999Assigned METROPCS, INC. 5562 LK CHARLES LA
2020-12-11 337-688-0XXX 0000–0999Assigned METROPCS, INC. 5562 LK CHARLES LA
2020-12-11 337-821-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F JENNINGS LA
2020-12-10 337-398-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F CROWLEY LA
2020-12-10 337-514-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F CROWLEY LA
2020-12-10 337-607-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SULPHUR LA
2020-12-04 337-606-7XXX 7000–7999Assigned ONVOY, LLC - LA 749E NEW IBERIA LA
2020-11-19 337-290-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OPELOUSAS LA
2020-11-18 337-915-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F CARENCRO LA
2020-11-05 337-270-5XXX 5000–5999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2020-11-05 337-270-6XXX 6000–6999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2020-11-05 337-270-7XXX 7000–7999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2020-11-05 337-270-8XXX 8000–8999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2020-11-05 337-549-5XXX 5000–5999Assigned ONVOY, LLC - LA 749E LK CHARLES LA
2020-11-05 337-549-6XXX 6000–6999Assigned ONVOY, LLC - LA 749E LK CHARLES LA
2020-11-05 337-549-7XXX 7000–7999Assigned ONVOY, LLC - LA 749E LK CHARLES LA
2020-11-05 337-549-8XXX 8000–8999Assigned ONVOY, LLC - LA 749E LK CHARLES LA
2020-10-28 337-200-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BASILE LA
2020-10-28 337-455-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BREAUX BDG LA
2020-10-28 337-472-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MAMOU LA
2020-10-28 337-847-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 ARNAUDVL LA
2020-10-20 337-285-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C KAPLAN LA
2020-10-19 337-549-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 LK CHARLES LA
2020-10-15 337-372-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MERRYVILLE LA
2020-10-13 337-472-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C MAMOU LA
2020-10-13 337-684-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CHURCH PT LA
2020-10-07 337-438-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
2020-10-07 337-485-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
2020-10-07 337-485-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
2020-09-25 337-336-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VL PLATTE LA
2020-09-24 337-399-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2020-09-24 337-399-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2020-09-24 337-399-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2020-09-24 337-512-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2020-09-24 337-512-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2020-09-24 337-512-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2020-09-17 337-607-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SULPHUR LA
2020-09-10 337-655-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2020-09-10 337-655-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2020-09-10 337-655-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2020-09-09 337-525-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C DE QUINCY LA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.